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Why aren't people using Mental Ray


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For metal surfaces you should use a metal(lume) or a

lume matal material(phong) shader(the lume metal material shader is hidden). There you can controll the blurred reflection.

For the light you should use a MR Area light with raytraced shadows.

Under Area Light Parameters you can change the size of the light:

bigger-->softer shadows.

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Hi I'm back.

What size are you rendering to? and what are your setitings?

 

This is what I set up to render while I was away. The only change was that I cranked up the photons and FG samples to 200 and 300. It took 5:30 @ 3000X2250. The only post work was brightening to match the render in Max. Somewhere along the line of playing with my gamma settings I have skrewed something up.

 

JHV

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Hey Justin,

sent you the file, I forgot that its set to look for the FG map so you might want to uncheck that before you render it, it seems like it doesn't save all that much time reusing the FG map, maybe its just me ??

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I hate to say it but I don't like the lamp material in any of these versions. It's coming out either too bright or kind of dull, and in that last one I think it might be more than 100% reflective.

 

Don't apologize, I was never really crazy about them either, I did like the vray ones better though, the MR ones look funky...

 

I lessend the blurryness of the metal material in this one (its Vray)...

 

I just don't want it to stand out too much...

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When you say accurate, what do you mean exactly?

 

If you are refering to light analysis then both MR and Vray are going to give you false information. Even Maxwell wont tell you the truth, even though it's supposidly physically accurate.

 

There is too much user guess work involved to call these accurate.

 

Manata, I have been looking at the file and there are a few things that stood out imediatly. I should have a bit more time later today to go into more detail.

 

JHV

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Sorry for the delay, things have been hectic here

 

Good work on the displacement, I must say that it looks more natural and softer than the Vray version which is too sharp and spikey.

 

the biggest issues were

1) the main omni, the arealight samples were way too high, try 8 instead of 12

2) The refraction on the whiskey glass and other glass elements was glogging the render

3) instead of high FG samples (1400 is too much) rather increase the Photons, think of FG as the secondry bounce engin of Vray. It fills and smooths the gaps that the primary engin leaves.

4) Have you changed the wall material? The noise bump seems exagerated compared to the previous version. The sampling on the wall needs fixing still

 

I have changed the lights to MR area lights. Put a max fall off on the main omni and removed the refraction on the glass. There are a few more things I would change, but no time for that now, sorry

 

 

I will package up the ammended file and send it back to you soon.

 

JHV

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Hey Justin,

looks really good, I'm not sure about the glass with no refraction though, I'll have to wait till its rendered at higher settings before I'll make my final comment on that, and no, I didn't change the wall bump, I think that will fix itself when rendered in the final, I meant to put glossy reflections on the mirror frame though, thanx for the tips on FG, I'll give it a try...

 

How long did this one take ?

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I agree that the glass is wrong without refraction, as to the time it is 1 hr, but I was doing 101 other processor intensive things at the same time so its not a true indication of the render time. As I said I could get this quicker, just looking for that ellusive 25th hr in the day at the moment.

 

Do you have access to max8? I will also send you the previous version, I think that light setup works better than this one.

 

JHV

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Hey Justin,

yes you can send me the max8 file, tell me, how high should I go with my photons and FG for a final image?

 

Oh and feel free to use this image in your portfolio, if you want, you earned it...

 

 

Bill

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You got mail.

 

I found that with the Max 8 I could use much lower settings than Max7. The settings in the Max8 file I have sent should be good for low res, maybe up both photons and FG up to 100 for the final

 

Thanks for the offer, I might just take you up on it. Its been a good exercise and fun to do.

 

If there's any other help needed feel free to ask

 

JHV

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